Gear-wheel.



J. SAY.

GEAR WHEEL.

APPLICATION TILED JUNE 16, 1911.

1 02 909 Patented June 11, 1912.

3 8HEETSSHEET 1.

COLUIIIA PLANOQIAPH 0-.'IMIIINIIION. a..

J. SAY.

GEAR WHEEL. APPLIGATIONVIILED 111111: 16, 1911.

1,028,909. Patented June 11, 1912.

3 BHBETS8HEET 2.

J. SAY.

GEAR WHEEL. APPLICATION FILED JUNE 16,1911. 1,028,909. Patented June 11,1912.

3 SHEETS-SHEET 3.

WITNESSES INVENTOR j; fig v I (7 ATIOR fiEYS COLUMBIA PLANOGRAFH e07,WASHINGTON, n. c.

UNITED STATES JADIES SAY, OF YORK, ENGLAND.

GEAR-WHEEL.

Specification of Letters Patent.

Patented June 11, 1912.

Application filed June 16, 1911. Serial No. 633,534.

T 0 all whom it may concern:

Be it known that I, JAMES SAY, a subject of the King of Great Britain,residing at 9 Pcnleys Grove street, York, in the county of York,England, have invented certain new and useful Improvements inGearlVheels, of which the following is a specifi cation.

This invention relates to gear wheels and has for its chief object toconstruct a gear wheel which will be silent in its action and possessgreat durability and will not be detrimentally affected by variations inatmospheric conditions. With a view to re ducing noise it has hithertobeen proposed to construct gear wheels from layers of fiber or of rawhide clamped together between metal plates but this construction is to acertain extent unsatisfactory by reason of the said materials beingliable to be affected by changes in temperature, or atmospheric conditions with the result that the tooth formation is liable to be alteredand the working of the gear wheel impaired.

According to this invention the gear wheel is manufactured from a stripof metal that is wound in the form of a coil the convolutions of whichare arranged in contact with each other and are secured together ifnecessary in any suitable manner, the teeth. being subsequently formedacross the convolutions. Plugs of dried wood or other suitable materialof a sound deadening nature, may be arranged to extend through theconvolutions in suitable proximity to the teeth and at suitableintervals apart. In order to cause the convolutions to occupy a positionin contact with each other the strip of metal from which suchconvolutions are formed is advantageously tapered in cross sectiontoward that edge which constitutes the inner peripheral surface of thecoil with the result that the strip becomes rectangular in cross sectionwhen wound owing to the strip being put into tension and compression onopposite sides of the neutral line. The strip so formed is convenientlywound while hot upon a man drel of suitable dimensions in such a mannerthat the convolutions lie in contact with each other, the contraction ofthe metal as it cools causing the convolutions to be firmly pressedtogether. After the coil has cooled it may be subjected to a picklingprocess in order to remove any scale or other deposit that may havecollected upon the surface of the metal during the heating process, theconvolutions of the coil being temporarily opened in any suitable mannerin order to enable the pickling process to be satisfactorily performed.After this operation has been ei'iected the ends of the coil may befaced and the convolutions secured together if found necessary. The coilcan then be machined to the required size and the teeth formed acrossthe co-nvolutions thereof.

In order that the said invention may be clearly understood and readilycarried into effect, the same is described more fully with reference tothe accompanying diagrammatic drawings, in which Figure 1 is anelevation, and Fig. 2 an edge view of a spur wheel constructed inaccordance with this invention. Fig. 2 is an elevation partly in sectionof a metallic sleeve having spaced bearing surfaces. Figs. 3 and t aresimilar views to Figs. 1 and 2 showing a form of the invention appliedto a bevel wheel, and Fig. 5 is a detached view of a wooden plugcombined with a metal sleeve having spaced bearing surfaces, in thiscase provided with screw threads. Figs. 6 and 7 illustrate a modifiedconstruction of spur wheel.

A represents the coil, and B the wooden plugs. In the example shown inFigs. 1 to 4 the coil A constitutes the complete gear wheel. In Figs. 1,2 and 2 the wooden plugs B are combined with metal sleeves 7) adapted tosupport each alternate convolution. For this purpose a number ofchannels Z) are turned in each of the sleeves to form plain cylindricalcollars b which are so spaced and arranged as to bear against eachalternate convolution. Longitudinal slots 5 extend through the greaterpart of the sleeves. The ends of the sleeve are then expanded intocounter-sunk holes formed in the end faces of the coil and the aforesaiddried wooden plugs are driven through the sleeve thereby causing thecollars b to be forced into intimate contact with the adjacent portionsof the convolutions.

In the example shown in Figs. 3 and 4 the holes that are formed in theconvolutions A to receive the sleeves b are tapped, and such sleeves arethreaded externally throughout their entire lengths. A number ofchannels Z) are then turned in the sleeve, each channel approximatelycorresponding in width to the thickness of one convolution and beingspaced from the preceding channel by a space that is also approximatelequal to the thickness of one convolution. The sleeve so formed is thenslotted at b for a portion of its length, Fig. 5, and is screwed throughone of the holes in the coil until the threaded portions of the sleeveengage with each alternate convolution, as shown in Fig. 4, the otherconvolutions which register with the channels in the sleeve remainingout of contact with the latter. The dried wooden plug B is now driventhrough the sleeve thereby causing its threaded portions to be expandedinto intimate contact with the threaded portions of the convolutions.The sleeves constructed in the manner above described are Secured in theconvolutions in such a manner that alternate sleeves engage withalternate convolutions.

If desired additional wooden plugs B may be interposed between the plugsB or the plugs B may be substituted for the plugs B that is to say forplugs combined with metal sleeves.

In the arrangements above described the coil has constituted thecomplete gear wheel but in some cases it may be more convenient for thecoil to form a portion of the gear Wheel only. An example of this kindis illustrated in Figs. 6 and '7 in which the coil A comprises anannular ring that is mounted upon a hub or body portion a and is clampedbetween a fixed flange a and a movable flange 0, by bolts and nuts a theaforesaid Wooden plugs being inserted through the convolutions betweenthe bolts a The invention hereinbefore described can be applied withadvantage to all types of spur and bevel gearing in which silence inrunning is a consideration.

What I claim and desire to secure by Letters Patent or" the UnitedStates is 1. A gear wheel comprising a continuous strip of metal woundedgewise in the form of a coil and having the teeth extending across theconvolutions thereof.

' 2. A gear wheel comprising a continuous strip of metal wound edgewisein the form of a coil and having the teeth extending across theconvolutions thereof and means for securing the convolutions together.

3. A gear wheel comprising a strip of metal wound in the form of a coiland having the teeth extending across the convolutions thereof. andplugs of sound deadening material extending through holes formed in themetal strip across the convolutions thereof.

4. A gear wheel comprising a strip of metal wound in the form of a coiland having the teeth extending across the convolutions thereof. andplugs extending through holes formed in the metal strip across theconvolutions thereof and formed with spaced bearing surfaces arranged tobear against each alternate convolution of the coil.

5. A gear wheel comprising a strip of metal wound in the form of a coiland having the teeth extending across the convolutions thereof, metalsleeves extending through holes formed in the metal strip across theconvolutions and formed with spaced bearing surfaces arranged to engagewith each alternate convolution and plugs of a sound deadening naturedriven into the said sleeves so as to expand the aforesaid bearingsurfaces into intimate contact with the adjacent portions or theconvolutions.

6. A gear wheel comprising a strip of metal wound in the form of a coiland having the teeth extending across the convolutions thereof, metalsleeves screwed through threaded holes formed in the metal strip acrossthe convolutions, each of the said sleeves being slotted for a portionof its length and formed with threaded bearing surfaces arranged toengage with each alternate convolution of the coil. and plugs of a sounddeadening nature driven into the said sleeves so as to expand theaforesaid bearing surfaces into intimate contact with the adjacentportions of the convolutions.

In testimony whereof I ai'iix my signature in presence of two witnesses.

JAMES SAY. l/Vitnesses:

L. E. BUCKLEY, CHARLES E. TAYLOR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

